Deerfield Waterworks
EPA ID: WI1130223 · 2,510 people served · 4 ZIP codes
ZipCheckup's reading of EPA records for Deerfield Waterworks (WI1130223): no drinking-water violations recorded since 2021. Across the monitored periods in available EPA data, Deerfield Waterworks has no violations listed for its service population of 2,510.
Data: EPA SDWIS
Service Area Map
Coverage area for Deerfield Waterworks Source: EPA SDWIS service area boundaries.
Service area boundary
Demographics of ZIP Codes Served
The ZIP codes associated with Deerfield Waterworks have a median household income of $98,354 and about 35,111 residents live in those ZIP codes (Census; not the number of people this system supplies). Approximately 58% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Deerfield Waterworks's water is classified in EPA records as a groundwater source. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
Superfund Proximity Note: This service area ranks in the 63th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS in ZIP Codes This System Serves
PFAS ("forever chemicals") have been reported in samples from water systems associated with the ZIP codes in this system's area. These results can come from other water systems serving the same ZIP codes; check the UCMR5 section for any results reported for this system. 1 detection recorded.
Comparable Water Systems
Similar-sized systems in Wisconsin
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Deerfield Waterworks (EPA ID: WI1130223) is a community water system in Wisconsin that serves approximately 2,510 people from groundwater sources.
This system provides water to 4 ZIP codes across 4 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0017 mg/L | No | 2023-12-31 |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
4 of 4 ZIP records with known zones are in EPA Radon Zone 1.
The EPA recommends testing all homes regardless of radon zone. County radon zones cannot replace an in-home radon test.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by WI or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View available EPA compliance records for Deerfield Waterworks (WI1130223) on EPA.gov.
Frequently Asked Questions
Is Deerfield Waterworks water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Deerfield Waterworks in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Deerfield Waterworks serve?
Deerfield Waterworks serves approximately 2,510 people across 4 ZIP codes in Wisconsin.
Where does Deerfield Waterworks get its water?
The primary water source is groundwater.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Deerfield Waterworks Water Quality Report, WI. https://zipcheckup.com/water-system/wi1130223/
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author = {{ZipCheckup}},
title = {{Deerfield Waterworks Water Quality Report, WI}},
year = {n.d.},
url = {https://zipcheckup.com/water-system/wi1130223/}
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